- Added 2 new blockschedulers, a greedy algorithm and an "optimal" ILP that
[libfirm] / ir / be / bechordal_main.c
index 350aed7..d2ebfa3 100644 (file)
@@ -4,7 +4,7 @@
  * @author Sebastian Hack
  * @cvs-id $Id$
  *
- * Copyright (C) 2005 Universitaet Karlsruhe
+ * Copyright (C) 2005-2006 Universitaet Karlsruhe
  * Released under the GPL
  *
  * Driver for the chordal register allocator.
@@ -13,6 +13,8 @@
 #include "config.h"
 #endif
 
+#include <time.h>
+
 #include "obst.h"
 #include "pset.h"
 #include "list.h"
 #include <libcore/lc_timing.h>
 #endif /* WITH_LIBCORE */
 
+#include "ircons_t.h"
 #include "irmode_t.h"
 #include "irgraph_t.h"
 #include "irprintf_t.h"
 #include "irgwalk.h"
+#include "ircons.h"
 #include "irdump.h"
 #include "irdom.h"
+#include "ircons.h"
 #include "irbitset.h"
+#include "irnode.h"
+#include "ircons.h"
 #include "debug.h"
 #include "xmalloc.h"
 #include "execfreq.h"
 #include "bearch.h"
 #include "beifg_t.h"
 #include "beifg_impl.h"
+#include "benode_t.h"
+#include "bestatevent.h"
 
 #include "bespillbelady.h"
 #include "bespillmorgan.h"
+#include "bespillslots.h"
 #include "belower.h"
 
 #ifdef WITH_ILP
 #include "bespillremat.h"
 #endif /* WITH_ILP */
 
+#include "bejavacoal.h"
 #include "becopystat.h"
 #include "becopyopt.h"
 #include "bessadestr.h"
 #include "beverify.h"
 #include "bespillcost.h"
+#include "benode_t.h"
 
 void be_ra_chordal_check(be_chordal_env_t *chordal_env) {
        const arch_env_t *arch_env = chordal_env->birg->main_env->arch_env;
@@ -116,12 +128,24 @@ int nodes_interfere(const be_chordal_env_t *env, const ir_node *a, const ir_node
 static be_ra_chordal_opts_t options = {
        BE_CH_DUMP_NONE,
        BE_CH_SPILL_BELADY,
-       BE_CH_COPYMIN_HEUR2,
        BE_CH_IFG_STD,
        BE_CH_LOWER_PERM_SWAP,
        BE_CH_VRFY_WARN,
 };
 
+/* coalesce spill slots */
+static int coalesce_spill_slots = 1;
+
+/** The name of the file where the statistics are put to. */
+static char stat_file_name[2048];
+
+/** Enable extreme live range splitting. */
+static int be_elr_split = 0;
+
+/** Assumed loop iteration count for execution frequency estimation. */
+static int be_loop_weight = 9;
+
+#ifdef WITH_LIBCORE
 static be_ra_timer_t ra_timer = {
        NULL,
        NULL,
@@ -133,9 +157,9 @@ static be_ra_timer_t ra_timer = {
        NULL,
        NULL,
        NULL,
+       NULL,
 };
 
-#ifdef WITH_LIBCORE
 static const lc_opt_enum_int_items_t spill_items[] = {
        { "morgan", BE_CH_SPILL_MORGAN },
        { "belady", BE_CH_SPILL_BELADY },
@@ -145,19 +169,6 @@ static const lc_opt_enum_int_items_t spill_items[] = {
        { NULL, 0 }
 };
 
-static const lc_opt_enum_int_items_t copymin_items[] = {
-       { "none",  BE_CH_COPYMIN_NONE      },
-       { "heur1", BE_CH_COPYMIN_HEUR1     },
-       { "heur2", BE_CH_COPYMIN_HEUR2     },
-       { "heur3", BE_CH_COPYMIN_HEUR3     },
-       { "stat",  BE_CH_COPYMIN_STAT      },
-       { "park",  BE_CH_COPYMIN_PARK_MOON },
-#ifdef WITH_ILP
-       { "ilp",   BE_CH_COPYMIN_ILP },
-#endif /* WITH_ILP */
-       { NULL, 0 }
-};
-
 static const lc_opt_enum_int_items_t ifg_flavor_items[] = {
        { "std",     BE_CH_IFG_STD     },
        { "fast",    BE_CH_IFG_FAST    },
@@ -179,16 +190,17 @@ static const lc_opt_enum_int_items_t lower_perm_stat_items[] = {
 };
 
 static const lc_opt_enum_int_items_t dump_items[] = {
-       { "spill",    BE_CH_DUMP_SPILL     },
-       { "live",     BE_CH_DUMP_LIVE      },
-       { "color",    BE_CH_DUMP_COLOR     },
-       { "copymin",  BE_CH_DUMP_COPYMIN   },
-       { "ssadestr", BE_CH_DUMP_SSADESTR  },
-       { "tree",     BE_CH_DUMP_TREE_INTV },
-       { "constr",   BE_CH_DUMP_CONSTR    },
-       { "lower",    BE_CH_DUMP_LOWER     },
-       { "appel",    BE_CH_DUMP_APPEL     },
-       { "all",      BE_CH_DUMP_ALL       },
+       { "spill",      BE_CH_DUMP_SPILL      },
+       { "live",       BE_CH_DUMP_LIVE       },
+       { "color",      BE_CH_DUMP_COLOR      },
+       { "copymin",    BE_CH_DUMP_COPYMIN    },
+       { "ssadestr",   BE_CH_DUMP_SSADESTR   },
+       { "tree",       BE_CH_DUMP_TREE_INTV  },
+       { "constr",     BE_CH_DUMP_CONSTR     },
+       { "lower",      BE_CH_DUMP_LOWER      },
+       { "spillslots", BE_CH_DUMP_SPILLSLOTS },
+       { "appel",      BE_CH_DUMP_APPEL      },
+       { "all",        BE_CH_DUMP_ALL        },
        { NULL, 0 }
 };
 
@@ -203,10 +215,6 @@ static lc_opt_enum_int_var_t spill_var = {
        &options.spill_method, spill_items
 };
 
-static lc_opt_enum_int_var_t copymin_var = {
-       &options.copymin_method, copymin_items
-};
-
 static lc_opt_enum_int_var_t ifg_flavor_var = {
        &options.ifg_flavor, ifg_flavor_items
 };
@@ -223,28 +231,22 @@ static lc_opt_enum_int_var_t be_ch_vrfy_var = {
        &options.vrfy_option, be_ch_vrfy_items
 };
 
-/** Dump copy minimization statistics. */
-static int be_copymin_stats = 0;
-
-/** Enable extreme live range splitting. */
-static int be_elr_split = 0;
-
-/** Assumed loop iteration count for execution frequency estimation. */
-static int be_loop_weight = 9;
-
 static const lc_opt_table_entry_t be_chordal_options[] = {
+       LC_OPT_ENT_STR      ("statfile",      "the name of the statisctics file", stat_file_name, sizeof(stat_file_name)),
+       LC_OPT_ENT_BOOL     ("spill.coal",    "coalesce the spill slots (default: yes)", &coalesce_spill_slots),
        LC_OPT_ENT_ENUM_INT ("spill",         "spill method (belady, morgan or remat)", &spill_var),
-       LC_OPT_ENT_ENUM_PTR ("copymin",       "copymin method (none, heur1, heur2, ilp1, ilp2 or stat)", &copymin_var),
        LC_OPT_ENT_ENUM_PTR ("ifg",           "interference graph flavour (std, fast, clique, pointer, list, check)", &ifg_flavor_var),
        LC_OPT_ENT_ENUM_PTR ("perm",          "perm lowering options (copy or swap)", &lower_perm_var),
        LC_OPT_ENT_ENUM_MASK("dump",          "select dump phases", &dump_var),
        LC_OPT_ENT_ENUM_PTR ("vrfy",          "verify options (off, warn, assert)", &be_ch_vrfy_var),
-       LC_OPT_ENT_BOOL     ("copymin_stats", "dump statistics of copy minimization", &be_copymin_stats),
        LC_OPT_ENT_BOOL     ("elrsplit",      "enable extreme live range splitting", &be_elr_split),
        LC_OPT_ENT_INT      ("loop_weight",   "assumed amount of loop iterations for guessing the execution frequency", &be_loop_weight),
        { NULL }
 };
 
+extern void be_spill_remat_register_options(lc_opt_entry_t *ent);
+
+
 static void be_ra_chordal_register_options(lc_opt_entry_t *grp)
 {
        static int run_once = 0;
@@ -255,10 +257,13 @@ static void be_ra_chordal_register_options(lc_opt_entry_t *grp)
                chordal_grp = lc_opt_get_grp(grp, "chordal");
 
                lc_opt_add_table(chordal_grp, be_chordal_options);
-       }
 
-       co_register_options(chordal_grp);
-       java_coal_register_options(chordal_grp);
+               co_register_options(chordal_grp);
+               be_java_coal_register_options(chordal_grp);
+#ifdef WITH_ILP
+               be_spill_remat_register_options(chordal_grp);
+#endif
+       }
 }
 #endif /* WITH_LIBCORE */
 
@@ -294,7 +299,7 @@ FILE *be_chordal_open(const be_chordal_env_t *env, const char *prefix, const cha
 {
        char buf[1024];
 
-       ir_snprintf(buf, sizeof(buf), "%s%F_%s.%s", prefix, env->irg, env->cls->name, suffix);
+       ir_snprintf(buf, sizeof(buf), "%s%F_%s%s", prefix, env->irg, env->cls->name, suffix);
        return fopen(buf, "wt");
 }
 
@@ -302,24 +307,24 @@ void check_ifg_implementations(be_chordal_env_t *chordal_env)
 {
        FILE *f;
 
-       f = be_chordal_open(chordal_env, "std", "log");
+       f = be_chordal_open(chordal_env, "std", ".log");
        chordal_env->ifg = be_ifg_std_new(chordal_env);
        be_ifg_check_sorted_to_file(chordal_env->ifg, f);
        fclose(f);
 
-       f = be_chordal_open(chordal_env, "list", "log");
+       f = be_chordal_open(chordal_env, "list", ".log");
        be_ifg_free(chordal_env->ifg);
        chordal_env->ifg = be_ifg_list_new(chordal_env);
        be_ifg_check_sorted_to_file(chordal_env->ifg, f);
        fclose(f);
 
-       f = be_chordal_open(chordal_env, "clique", "log");
+       f = be_chordal_open(chordal_env, "clique", ".log");
        be_ifg_free(chordal_env->ifg);
        chordal_env->ifg = be_ifg_clique_new(chordal_env);
        be_ifg_check_sorted_to_file(chordal_env->ifg, f);
        fclose(f);
 
-       f = be_chordal_open(chordal_env, "pointer", "log");
+       f = be_chordal_open(chordal_env, "pointer", ".log");
        be_ifg_free(chordal_env->ifg);
        chordal_env->ifg = be_ifg_pointer_new(chordal_env);
        be_ifg_check_sorted_to_file(chordal_env->ifg, f);
@@ -336,10 +341,19 @@ static void memory_operand_walker(ir_node *irn, void *env) {
        const arch_env_t *aenv = cenv->birg->main_env->arch_env;
        const ir_edge_t  *edge, *ne;
        ir_node          *block;
+       ir_node          *spill;
 
        if (! be_is_Reload(irn))
                return;
 
+       /* always use addressmode, it's good for x86 */
+#if 0
+       /* only use memory operands, if the reload is only used by 1 node */
+       if(get_irn_n_edges(irn) > 1)
+               return;
+#endif
+
+       spill = be_get_Reload_mem(irn);
        block = get_nodes_block(irn);
 
        foreach_out_edge_safe(irn, edge, ne) {
@@ -351,7 +365,7 @@ static void memory_operand_walker(ir_node *irn, void *env) {
 
                if (get_nodes_block(src) == block && arch_possible_memory_operand(aenv, src, pos)) {
                        DBG((cenv->dbg, LEVEL_3, "performing memory operand %+F at %+F\n", irn, src));
-                       arch_perform_memory_operand(aenv, src, irn, pos);
+                       arch_perform_memory_operand(aenv, src, spill, pos);
                }
        }
 
@@ -371,39 +385,121 @@ static INLINE void check_for_memory_operands(be_chordal_env_t *chordal_env) {
 }
 
 /**
- * Performs chordal register allocation for each register class on given irg.
- *
- * @param bi  Backend irg object
- * @return Structure containing timer for the single phases or NULL if no timing requested.
+ * Sorry for doing stats again...
  */
-static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
+typedef struct _node_stat_t {
+       unsigned int n_phis;      /**< Phis of the current register class. */
+       unsigned int n_mem_phis;  /**< Memory Phis (Phis with spill operands). */
+       unsigned int n_copies;    /**< Copies */
+       unsigned int n_perms;     /**< Perms */
+       unsigned int n_spills;    /**< Spill nodes */
+       unsigned int n_reloads;   /**< Reloads */
+} node_stat_t;
+
+struct node_stat_walker {
+       node_stat_t *stat;
+       const be_chordal_env_t *cenv;
+       bitset_t *mem_phis;
+};
+
+static void node_stat_walker(ir_node *irn, void *data)
 {
-       const be_main_env_t *main_env  = bi->main_env;
-       const arch_isa_t    *isa       = arch_env_get_isa(main_env->arch_env);
-       ir_graph            *irg       = bi->irg;
-       be_options_t        *main_opts = main_env->options;
-       int                  splitted  = 0;
-       copy_opt_t          *co;
+       struct node_stat_walker *env = data;
+       const arch_env_t *aenv       = env->cenv->birg->main_env->arch_env;
 
-       int j, m;
-       be_chordal_env_t chordal_env;
+       if(arch_irn_consider_in_reg_alloc(aenv, env->cenv->cls, irn)) {
+
+               /* if the node is a normal phi */
+               if(is_Phi(irn))
+                       env->stat->n_phis++;
+
+               else if(arch_irn_classify(aenv, irn) & arch_irn_class_spill)
+                       ++env->stat->n_spills;
 
+               else if(arch_irn_classify(aenv, irn) & arch_irn_class_reload)
+                       ++env->stat->n_reloads;
+
+               else if(arch_irn_classify(aenv, irn) & arch_irn_class_copy)
+                       ++env->stat->n_copies;
+
+               else if(arch_irn_classify(aenv, irn) & arch_irn_class_perm)
+                       ++env->stat->n_perms;
+       }
+
+       /* a mem phi is a PhiM with a mem phi operand or a Spill operand */
+       else if(is_Phi(irn) && get_irn_mode(irn) == mode_M) {
+               int i;
+
+               for(i = get_irn_arity(irn) - 1; i >= 0; --i) {
+                       ir_node *op = get_irn_n(irn, i);
+
+                       if((is_Phi(op) && bitset_contains_irn(env->mem_phis, op)) || (arch_irn_classify(aenv, op) & arch_irn_class_spill)) {
+                               bitset_add_irn(env->mem_phis, irn);
+                               env->stat->n_mem_phis++;
+                               break;
+                       }
+               }
+       }
+}
+
+static void node_stats(const be_chordal_env_t *cenv, node_stat_t *stat)
+{
+       struct node_stat_walker env;
+
+       memset(stat, 0, sizeof(stat[0]));
+       env.cenv     = cenv;
+       env.mem_phis = bitset_irg_malloc(cenv->irg);
+       env.stat     = stat;
+       irg_walk_graph(cenv->irg, NULL, node_stat_walker, &env);
+       bitset_free(env.mem_phis);
+}
+
+static void insn_count_walker(ir_node *irn, void *data)
+{
+       int *cnt = data;
+
+       switch(get_irn_opcode(irn)) {
+       case iro_Proj:
+       case iro_Phi:
+       case iro_Start:
+       case iro_End:
+               break;
+       default:
+               (*cnt)++;
+       }
+}
+
+static unsigned int count_insns(ir_graph *irg)
+{
+       int cnt = 0;
+       irg_walk_graph(irg, insn_count_walker, NULL, &cnt);
+       return cnt;
+}
+
+#ifdef WITH_LIBCORE
+/**
+ * Initialize all timers.
+ */
+static void be_init_timer(be_options_t *main_opts)
+{
        if (main_opts->timing == BE_TIME_ON) {
-               ra_timer.t_prolog  = lc_timer_register("ra_prolog",   "regalloc prolog");
-               ra_timer.t_epilog  = lc_timer_register("ra_epilog",   "regalloc epilog");
-               ra_timer.t_live    = lc_timer_register("ra_liveness", "be liveness");
-               ra_timer.t_spill   = lc_timer_register("ra_spill",    "spiller");
-               ra_timer.t_color   = lc_timer_register("ra_color",    "graph coloring");
-               ra_timer.t_ifg     = lc_timer_register("ra_ifg",      "interference graph");
-               ra_timer.t_copymin = lc_timer_register("ra_copymin",  "copy minimization");
-               ra_timer.t_ssa     = lc_timer_register("ra_ssadestr", "ssa destruction");
-               ra_timer.t_verify  = lc_timer_register("ra_verify",   "graph verification");
-               ra_timer.t_other   = lc_timer_register("ra_other",    "other time");
+               ra_timer.t_prolog     = lc_timer_register("ra_prolog",     "regalloc prolog");
+               ra_timer.t_epilog     = lc_timer_register("ra_epilog",     "regalloc epilog");
+               ra_timer.t_live       = lc_timer_register("ra_liveness",   "be liveness");
+               ra_timer.t_spill      = lc_timer_register("ra_spill",      "spiller");
+               ra_timer.t_spillslots = lc_timer_register("ra_spillslots", "spillslots");
+               ra_timer.t_color      = lc_timer_register("ra_color",      "graph coloring");
+               ra_timer.t_ifg        = lc_timer_register("ra_ifg",        "interference graph");
+               ra_timer.t_copymin    = lc_timer_register("ra_copymin",    "copy minimization");
+               ra_timer.t_ssa        = lc_timer_register("ra_ssadestr",   "ssa destruction");
+               ra_timer.t_verify     = lc_timer_register("ra_verify",     "graph verification");
+               ra_timer.t_other      = lc_timer_register("ra_other",      "other time");
 
                LC_STOP_AND_RESET_TIMER(ra_timer.t_prolog);
                LC_STOP_AND_RESET_TIMER(ra_timer.t_epilog);
                LC_STOP_AND_RESET_TIMER(ra_timer.t_live);
                LC_STOP_AND_RESET_TIMER(ra_timer.t_spill);
+               LC_STOP_AND_RESET_TIMER(ra_timer.t_spillslots);
                LC_STOP_AND_RESET_TIMER(ra_timer.t_color);
                LC_STOP_AND_RESET_TIMER(ra_timer.t_ifg);
                LC_STOP_AND_RESET_TIMER(ra_timer.t_copymin);
@@ -411,15 +507,19 @@ static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
                LC_STOP_AND_RESET_TIMER(ra_timer.t_verify);
                LC_STOP_AND_RESET_TIMER(ra_timer.t_other);
        }
+}
 
-#define BE_TIMER_PUSH(timer)                                                        \
-       if (main_opts->timing == BE_TIME_ON) {                                          \
-               int res = lc_timer_push(timer);                                             \
-               if (options.vrfy_option == BE_CH_VRFY_ASSERT)                               \
-                       assert(res && "Timer already on stack, cannot be pushed twice.");       \
-               else if (options.vrfy_option == BE_CH_VRFY_WARN && ! res)                   \
-                       fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
-                               lc_timer_get_name(timer));                                          \
+#define BE_TIMER_INIT(main_opts)       be_init_timer(main_opts)
+
+#define BE_TIMER_PUSH(timer)                                                            \
+       if (main_opts->timing == BE_TIME_ON) {                                              \
+               if (! lc_timer_push(timer)) {                                                   \
+                       if (options.vrfy_option == BE_CH_VRFY_ASSERT)                               \
+                               assert(!"Timer already on stack, cannot be pushed twice.");             \
+                       else if (options.vrfy_option == BE_CH_VRFY_WARN)                            \
+                               fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
+                                       lc_timer_get_name(timer));                                          \
+               }                                                                               \
        }
 #define BE_TIMER_POP(timer)                                                                    \
        if (main_opts->timing == BE_TIME_ON) {                                                     \
@@ -431,7 +531,59 @@ static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
                                lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
                timer = tmp;                                                                           \
        }
+#else
+
+#define BE_TIMER_INIT(main_opts)
+#define BE_TIMER_PUSH(timer)
+#define BE_TIMER_POP(timer)
+
+#endif /* WITH_LIBCORE */
+
+enum {
+       STAT_TAG_FILE = 0,
+       STAT_TAG_TIME = 1,
+       STAT_TAG_IRG  = 2,
+       STAT_TAG_CLS  = 3,
+       STAT_TAG_LAST
+};
+
+/**
+ * Performs chordal register allocation for each register class on given irg.
+ *
+ * @param bi  Backend irg object
+ * @return Structure containing timer for the single phases or NULL if no timing requested.
+ */
+static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
+{
+       const be_main_env_t *main_env  = bi->main_env;
+       const arch_isa_t    *isa       = arch_env_get_isa(main_env->arch_env);
+       ir_graph            *irg       = bi->irg;
+       be_options_t        *main_opts = main_env->options;
+       int                   splitted = 0;
+       FILE                *stat_file = NULL;
+
+       char time_str[32];
+       char irg_name[128];
+       int j, m, line;
+       be_chordal_env_t chordal_env;
+       const char *stat_tags[STAT_TAG_LAST];
+
+       /* if we want to do some statistics, push the environment. */
+       if(strlen(stat_file_name) > 0 && (stat_file = fopen(stat_file_name, "at")) != NULL) {
+
+               /* initialize the statistics tags */
+               ir_snprintf(time_str, sizeof(time_str),"%u", time(NULL));
+               ir_snprintf(irg_name, sizeof(irg_name), "%F", irg);
+
+               stat_tags[STAT_TAG_FILE] = be_retrieve_dbg_info(get_entity_dbg_info(get_irg_entity(irg)), &line);
+               stat_tags[STAT_TAG_TIME] = time_str;
+               stat_tags[STAT_TAG_IRG]  = irg_name;
+               stat_tags[STAT_TAG_CLS]  = "<all>";
+
+               be_stat_ev_push(stat_tags, STAT_TAG_LAST, stat_file);
+       }
 
+       BE_TIMER_INIT(main_opts);
        BE_TIMER_PUSH(ra_timer.t_other);
        BE_TIMER_PUSH(ra_timer.t_prolog);
 
@@ -441,7 +593,8 @@ static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
        chordal_env.irg       = irg;
        chordal_env.birg      = bi;
        chordal_env.dom_front = be_compute_dominance_frontiers(irg);
-       chordal_env.exec_freq = compute_execfreq(irg, be_loop_weight);
+       chordal_env.exec_freq = bi->execfreqs;
+               /*compute_execfreq(irg, be_loop_weight);*/
        chordal_env.lv        = be_liveness(irg);
        FIRM_DBG_REGISTER(chordal_env.dbg, "firm.be.chordal");
 
@@ -449,24 +602,37 @@ static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
 
        BE_TIMER_POP(ra_timer.t_prolog);
 
+       be_stat_ev("insns_before", count_insns(irg));
+
        /* Perform the following for each register class. */
        for (j = 0, m = arch_isa_get_n_reg_class(isa); j < m; ++j) {
-               FILE *f;
-               copy_opt_t *co = NULL;
+               node_stat_t node_stat;
 
                chordal_env.cls           = arch_isa_get_reg_class(isa, j);
                chordal_env.border_heads  = pmap_create();
                chordal_env.ignore_colors = bitset_malloc(chordal_env.cls->n_regs);
 
+               stat_tags[STAT_TAG_CLS] = chordal_env.cls->name;
+
+               if(stat_file) {
+                       be_stat_ev_push(stat_tags, STAT_TAG_LAST, stat_file);
+
+                       /* perform some node statistics. */
+                       node_stats(&chordal_env, &node_stat);
+                       be_stat_ev("phis_before_spill", node_stat.n_phis);
+               }
+
                /* put all ignore registers into the ignore register set. */
                put_ignore_colors(&chordal_env);
 
                BE_TIMER_PUSH(ra_timer.t_live);
                be_liveness_recompute(chordal_env.lv);
                BE_TIMER_POP(ra_timer.t_live);
-
                dump(BE_CH_DUMP_LIVE, irg, chordal_env.cls, "-live", dump_ir_block_graph_sched);
 
+               be_pre_spill_prepare_constr(&chordal_env);
+               dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-constr-pre", dump_ir_block_graph_sched);
+
                BE_TIMER_PUSH(ra_timer.t_spill);
 
                /* spilling */
@@ -479,10 +645,8 @@ static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
                        break;
 #ifdef WITH_ILP
                case BE_CH_SPILL_REMAT:
-                       /*
                        be_spill_remat(&chordal_env);
                        break;
-                       */
 #endif /* WITH_ILP */
                default:
                        fprintf(stderr, "no valid spiller selected. falling back to belady\n");
@@ -491,32 +655,37 @@ static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
 
                BE_TIMER_POP(ra_timer.t_spill);
 
-               DBG((chordal_env.dbg, LEVEL_1, "spill costs for %+F in regclass %s: %g\n",
-                     irg,
-                     chordal_env.cls->name,
-                     get_irg_spill_cost(&chordal_env))
-                   );
+               if(stat_file) {
+                       node_stats(&chordal_env, &node_stat);
+                       be_stat_ev("phis_after_spill", node_stat.n_phis);
+                       be_stat_ev("mem_phis", node_stat.n_mem_phis);
+                       be_stat_ev("reloads", node_stat.n_reloads);
+                       be_stat_ev("spills", node_stat.n_spills);
+               }
+
+               DBG((chordal_env.dbg, LEVEL_1, "spill costs for %+F in regclass %s: %g\n",irg, chordal_env.cls->name, get_irg_spill_cost(&chordal_env)));
 
                dump(BE_CH_DUMP_SPILL, irg, chordal_env.cls, "-spill", dump_ir_block_graph_sched);
-               be_abi_fix_stack_nodes(bi->abi, chordal_env.lv);
-               be_compute_spill_offsets(&chordal_env);
+
                check_for_memory_operands(&chordal_env);
 
+               be_abi_fix_stack_nodes(bi->abi, chordal_env.lv);
+
                BE_TIMER_PUSH(ra_timer.t_verify);
 
                /* verify schedule and register pressure */
                if (options.vrfy_option == BE_CH_VRFY_WARN) {
                        be_verify_schedule(irg);
-                       be_verify_register_pressure(chordal_env.birg->main_env->arch_env, chordal_env.cls, irg);
+                       be_verify_register_pressure(chordal_env.birg, chordal_env.cls, irg);
                }
                else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
                        assert(be_verify_schedule(irg) && "Schedule verification failed");
-                       assert(be_verify_register_pressure(chordal_env.birg->main_env->arch_env, chordal_env.cls, irg)
+                       assert(be_verify_register_pressure(chordal_env.birg, chordal_env.cls, irg)
                                && "Register pressure verification failed");
                }
                BE_TIMER_POP(ra_timer.t_verify);
 
-               if(be_elr_split && !splitted) {
+               if (be_elr_split && ! splitted) {
                        extreme_liverange_splitting(&chordal_env);
                        splitted = 1;
                }
@@ -555,77 +724,39 @@ static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
                }
                BE_TIMER_POP(ra_timer.t_ifg);
 
+               if(stat_file) {
+                       be_ifg_stat_t stat;
+                       be_ifg_stat(&chordal_env, &stat);
+                       be_stat_ev("ifg_nodes", stat.n_nodes);
+                       be_stat_ev("ifg_edges", stat.n_edges);
+                       be_stat_ev("ifg_comps", stat.n_comps);
+               }
+
                BE_TIMER_PUSH(ra_timer.t_verify);
-               if (options.vrfy_option != BE_CH_VRFY_OFF)
-                       be_ra_chordal_check(&chordal_env);
+               if (options.vrfy_option != BE_CH_VRFY_OFF) {
+                       //be_ra_chordal_check(&chordal_env);
+               }
 
                BE_TIMER_POP(ra_timer.t_verify);
 
-               /* copy minimization */
-               BE_TIMER_PUSH(ra_timer.t_copymin);
-               co = NULL;
-               if (options.copymin_method != BE_CH_COPYMIN_NONE && options.copymin_method != BE_CH_COPYMIN_STAT) {
-                       co = new_copy_opt(&chordal_env, co_get_costs_exec_freq);
-                       co_build_ou_structure(co);
-                       co_build_graph_structure(co);
-                       if(be_copymin_stats) {
-                               ir_printf("%40F %20s\n", current_ir_graph, chordal_env.cls->name);
-                               printf("max copy costs:         %d\n", co_get_max_copy_costs(co));
-                               printf("init copy costs:        %d\n", co_get_copy_costs(co));
-                               printf("inevit copy costs:      %d\n", co_get_inevit_copy_costs(co));
-                               printf("copy costs lower bound: %d\n", co_get_lower_bound(co));
-                       }
-
-                       /* Dump the interference graph in Appel's format. */
-                       if(options.dump_flags & BE_CH_DUMP_APPEL) {
-                               FILE *f = be_chordal_open(&chordal_env, "appel-", "apl");
-                               co_dump_appel_graph(co, f);
-                               fclose(f);
-                       }
-               }
-
-               switch(options.copymin_method) {
-                       case BE_CH_COPYMIN_HEUR1:
-                               co_solve_heuristic(co);
-                               break;
-                       case BE_CH_COPYMIN_HEUR2:
-                               co_solve_heuristic_new(co);
-                               break;
-                       case BE_CH_COPYMIN_HEUR3:
-                               co_solve_heuristic_java(co);
-                               break;
-                       case BE_CH_COPYMIN_PARK_MOON:
-                               co_solve_park_moon(co);
-                               break;
-                       case BE_CH_COPYMIN_STAT:
-                               co_compare_solvers(&chordal_env);
-                               break;
-#ifdef WITH_ILP
-                       case BE_CH_COPYMIN_ILP:
-                               co_solve_ilp2(co, 60.0);
-                               break;
-#endif /* WITH_ILP */
-                       case BE_CH_COPYMIN_NONE:
-                       default:
-                               break;
+               if(stat_file) {
+                       node_stats(&chordal_env, &node_stat);
+                       be_stat_ev("perms_before_coal", node_stat.n_perms);
+                       be_stat_ev("copies_before_coal", node_stat.n_copies);
                }
 
-               if (co) {
-                       if(be_copymin_stats) {
-                               printf("final copy costs      : %d\n", co_get_copy_costs(co));
-                       }
-                       co_free_graph_structure(co);
-                       co_free_ou_structure(co);
-                       free_copy_opt(co);
-               }
+               /* copy minimization */
+               BE_TIMER_PUSH(ra_timer.t_copymin);
+               co_driver(&chordal_env);
                BE_TIMER_POP(ra_timer.t_copymin);
 
                dump(BE_CH_DUMP_COPYMIN, irg, chordal_env.cls, "-copymin", dump_ir_block_graph_sched);
 
                BE_TIMER_PUSH(ra_timer.t_verify);
 
-               if (options.vrfy_option != BE_CH_VRFY_OFF)
-                       be_ra_chordal_check(&chordal_env);
+               if (options.vrfy_option != BE_CH_VRFY_OFF) {
+                       //be_ra_chordal_check(&chordal_env);
+               }
 
                BE_TIMER_POP(ra_timer.t_verify);
                BE_TIMER_PUSH(ra_timer.t_ssa);
@@ -640,18 +771,41 @@ static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
                BE_TIMER_PUSH(ra_timer.t_verify);
                if (options.vrfy_option != BE_CH_VRFY_OFF) {
                        be_ssa_destruction_check(&chordal_env);
-                       be_ra_chordal_check(&chordal_env);
+                       //be_ra_chordal_check(&chordal_env);
                }
                BE_TIMER_POP(ra_timer.t_verify);
 
-               if (options.copymin_method == BE_CH_COPYMIN_STAT)
-                       copystat_dump(irg);
-
                be_ifg_free(chordal_env.ifg);
                pmap_destroy(chordal_env.border_heads);
                bitset_free(chordal_env.ignore_colors);
+
+               if(stat_file) {
+                       node_stats(&chordal_env, &node_stat);
+                       be_stat_ev("perms_after_coal", node_stat.n_perms);
+                       be_stat_ev("copies_after_coal", node_stat.n_copies);
+               }
+
+               be_stat_ev_pop();
        }
 
+       BE_TIMER_PUSH(ra_timer.t_spillslots);
+
+       be_coalesce_spillslots(&chordal_env, coalesce_spill_slots);
+       dump(BE_CH_DUMP_SPILLSLOTS, irg, NULL, "-spillslots", dump_ir_block_graph_sched);
+
+       BE_TIMER_POP(ra_timer.t_spillslots);
+
+       BE_TIMER_PUSH(ra_timer.t_verify);
+
+       /* verify spillslots */
+       if (options.vrfy_option == BE_CH_VRFY_WARN) {
+               be_verify_spillslots(main_env->arch_env, irg);
+       }
+       else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
+               assert(be_verify_spillslots(main_env->arch_env, irg) && "Spillslot verification failed");
+       }
+       BE_TIMER_POP(ra_timer.t_verify);
+
        BE_TIMER_PUSH(ra_timer.t_epilog);
 
        dump(BE_CH_DUMP_LOWER, irg, NULL, "-spilloff", dump_ir_block_graph_sched);
@@ -662,20 +816,28 @@ static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
        obstack_free(&chordal_env.obst, NULL);
        be_free_dominance_frontiers(chordal_env.dom_front);
        be_liveness_free(chordal_env.lv);
-       free_execfreq(chordal_env.exec_freq);
+       //free_execfreq(chordal_env.exec_freq);
 
        BE_TIMER_POP(ra_timer.t_epilog);
        BE_TIMER_POP(ra_timer.t_other);
 
-#undef BE_TIMER_PUSH
-#undef BE_TIMER_POP
+       be_stat_ev("insns_after", count_insns(irg));
+       be_stat_ev_pop();
+
+       if(stat_file)
+               fclose(stat_file);
 
+#ifdef WITH_LIBCORE
        return main_opts->timing == BE_TIME_ON ? &ra_timer : NULL;
+#endif /* WITH_LIBCORE */
+       return NULL;
 }
 
 const be_ra_t be_ra_chordal_allocator = {
 #ifdef WITH_LIBCORE
        be_ra_chordal_register_options,
-#endif
        be_ra_chordal_main
+#else
+       0
+#endif
 };